Batch Scaling Around 30g Powdered / Confectioners' Sugar
| Batch Scale | Weight (g / oz) | US Cups & Spoons | Metric (mL) |
|---|---|---|---|
| Half Batch (0.5×) | 15g (0.53 oz) | ⅛ cup | 29.6 mL |
| Standard (1×) | 30g (1.06 oz) | ¼ cup | 59.1 mL |
| 1.5× Batch | 45g (1.59 oz) | ⅓ cup + 2 tsp | 88.7 mL |
| Double Batch (2×) | 60g (2.12 oz) | ½ cup | 118.3 mL |
| Triple Batch (3×) | 90g (3.17 oz) | ¾ cup | 177.4 mL |
Measuring 30g of Powdered / Confectioners' Sugar in the Kitchen
Because 1 US Customary Cup (236.6 mL) of powdered / confectioners' sugar weighs 120g when measured unsifted spooned, 30 Grams (30g) translates to 0.25 US cups (¼ cup). By contrast, using the sifted measure (100g/cup — a 20g per-cup shift), 30g occupies ¼ cup + 2 ½ tsp (0.30 cups).
Without a kitchen scale, measure ¼ cup (4 tablespoons total) using unsifted spooned technique. Spoon gently into the measuring cup and level flat. If your recipe calls for sifted powdered sugar, measure after sifting (100g/cup) or weigh directly.
Source note: USDA FoodData Central #169658 & Domino Confectioners 10-X specifications
Frequently Asked Questions
How many cups is 30 grams of powdered / confectioners' sugar? ▾
30 grams of powdered / confectioners' sugar (unsifted spooned, 120g per US cup) equals ¼ cup (0.25 US Customary Cups, 0.24 Metric 250 mL cups, or 4 tablespoons).
Why does powdered sugar contain cornstarch? ▾
Commercial confectioners sugar contains about 3% cornstarch as an anti-caking agent to prevent the microscopic particles from clumping.
Why do recipes specify sifted versus unsifted powdered sugar? ▾
Sifted powdered sugar traps significant air, dropping cup weight from 120g down to 100g—a 20% reduction in sweetness.